/*
 * Copyright 2009 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.google.reducisaurus.servlets;

import com.yahoo.platform.yui.compressor.CssCompressor;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.StringReader;
import java.io.StringWriter;

@SuppressWarnings("serial")
public class CssServlet extends BaseServlet {
  private static final int WRAP_AT_COLUMN = 80;
  private static final String MIME_TYPE_CSS = "text/css; charset=utf-8";

  @Override
  protected final Response process(final HttpServletResponse resp,
      final StringReader jssr) throws IOException {
    CssCompressor css = new CssCompressor(jssr);
    StringWriter sw = new StringWriter();

    resp.setContentType(MIME_TYPE_CSS);
    css.compress(sw, WRAP_AT_COLUMN);
    return Response.of(true, sw.toString());
  }

  @Override
  protected final void render(final HttpServletResponse resp,
      final String response) throws IOException {
    resp.setContentType(MIME_TYPE_CSS);
    resp.getWriter().print(response);
  }
}
